GTA5-Mods.com'a hos geldiniz

Am I doing it right when I have friends ip on list, do first step, then 2) activate firewall, then 3) block, then 4) find. I am alone on server, so I click Allow that anybody can enter session (because when it says block, my friends cannot join), so my friends join, then I click block and it kick my friends even though I have their addresses. Why?? (sorry for my english, English isn't my native language)